John Norman is the pseudonym of John Frederick Lange, Jr., a New York-based science fantasy writer and philosophy professor. {{BREAK}} Gor Book Revisions Editions since 2001 have included numerous revisions compared to earlier editions. Analysis done by Simon of Tabor. Word counts of editions:

No.	Title	Original Length	Revised Length	Length Increase	Percentage Increase
1	Tarnsman of Gor	67,904	67,901	-3	0.00
2	Outlaw of Gor	73,294	73,337	43	0.06
3	Priest-Kings of Gor	107,274	107,276	2	0.00
4	Nomads of Gor	128,141	129,268	1,127	0.88
5	Assassin of Gor	140,684	140,711	27	0.02
6	Raiders of Gor	111,193	112,954	1,761	1.58
7	Captive of Gor	123,336	144,948	21,612	17.53
8	Hunters of Gor	119,746	122,071	2,325	1.94
9	Marauders of Gor	114,389	115,257	868	0.76
10	Tribesmen of Gor	143,087	164,491	21,404	14.96
11	Slave Girl of Gor	190,638	210,936	20,298	10.65
12	Beasts of Gor	168,053	175,245	7,192	4.28
13	Explorers of Gor	172,370	181,697	9,327	5.41
14	Fighting Slave of Gor	133,265	143,735	10,470	7.86
15	Rogue of Gor	103,074	111,293	8,219	7.98
16	Guardsman of Gor	105,840	129,319	23,479	22.19
17	Savages of Gor	117,931	130,218	12,287	10.42
18	Blood Brothers of Gor	173,772	183,909	10,137	5.84
19	Kajira of Gor	162,573	184,039	21,466	13.21
20	Players of Gor	146,141	159,682	13,541	9.27
21	Mercenaries of Gor	140,691	165,247	24,556	17.46
22	Dancer of Gor	198,606	204,575	5,969	3.01
23	Renegades of Gor	153,331	179,768	26,437	17.24
24	Vagabonds of Gor	170,518	177,333	6,815	4.00
25	Magicians of Gor	189,955	207,801	17,846	9.40
26	Witness of Gor	284,207	284,207	0	0.00
	Total	3,740,013	4,007,218	267,205	7.14